Filter.



PATENTED 00T. 6, 1903.

A. H. KOHLMBYER.

FILTER.

APPLIGATIGN FILED Nov. 24o 1902.

HO MODEL.

hu: Models varias cs.. mofauwu.. 'msumai'ok a. c;

lFILTER.

APPLIGATION FILED Nov. 24. 1902. Y

No MODEL, I l 2 SHEETS-SHEET 2.

AUGUST H. KOHLMEYER,

Patented October 6, 1903.

PATENT OFFICE.

OF ST. LOUIS, MISSOURI.r

FILTER.

SPECIFICATION forming' part of Letters Patent No. 740,574, dated October 6, 1903.

Application led November 24, 1902. Serial No. 132,542. (No model.) l

of the city of St. Louis, State of Missouri, have n invented a new and useful Improvement in `Filters, of which the following is a specification.

My invention relates to filters, and has for its principal objects to provide yfor the uniform abrasion of the filter-stones, to provide for the use of -filter-stones of dierent diameters, to provide for the adjustment of the abrasion blocks or strips, to improve the mounting of such abrasion-blocks, and generally to ilpprove the construction and operation of the ter.

My invention consists in the arrangements and combinations of parts hereinafter described and claimed.

In the accompanyingdrawings, which form part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure 1 is a vertical sectional viewon the plane indicated by the line 1 1 of Fig. 3. Fig. 2 is a vertical sectional viewy of the scraper mechanism on the line 2 2 of Fig. 4.

Fig. 3 is a plan View of my filter with the capplate removed, as indicated by the line 3 3 of Fig. 1. Fig. 4 is a horizontal section of my filter on theplane of the line 4 4 of Fig. 1.

My filter comprises a tank 1, provided with hollow cylindrical filter-stones 2, -rotatively mounted in any suitable manner. Preferably the filter-stones are arranged vertically in one or more pairs, cach stone consisting of one or more sections secured together and provided axially at the end with projecting spindles 3. The lower spindles turn in a step' 4, provided therefor on the bottom of the.

tank, and the upper spindle projects through openings in a cross-piece 5, provided therefor in the upper portion of the ilter. The supply-pipe 6 opens into the body of the tank, and the outlet-pipe 7 communicates with perforated pipes arranged in the hollow interiors of the respective stones, and the inlet and outlet pipe connections are arranged in accordance with common practice.

The shafts or spindles which supportthe respective lter-stones have each a gearwheel 8 mounted thereon and arranged to in` termesh with one another, so as to constitute a train of gears. The upper shaft or spindle of one of the stonesihas a beveled gear 9 mounted thereon, with which meshes a bevyeled gear 10, fixed upon' a suitably-mounted shaft 1l, which projects through the filtertank and is provided at the outside thereof with a. hand-crank 12. By this arrangement the motion eiected by means of the handcrank is transmitted to allof the filter-stones.

A second shaft 13 is mounted horizontally inside of the filter-tank, and one end thereof projects therethrough and is provided With a handcrank or with a head 14, adapted for a hand-crank to t upon. This shaft has its respective end'portionsthreaded in opposite directions, and upon each of said threaded portions are mounted two nuts 15 16,1arranged in pairs. The outermost nut 15 of each pair has a vertically-elongated U -shaped frame 17 xed thereto. The innermost nut 16 of each pair is connected, by means of metal strips or braces 18, to the upper and lower end portions of said U-shaped frame 17. Near the upper end of the U-shaped frame is fixed a rod 19, which extends horizontally across the tank through a groove or opening 20 in said frame, and thereby constitutes a guide for preventing the'rotary movement thereof.

The sides of the U-shaped frame constitute an abutment or bearing-surface for the bases 21'ofthe arms 22, which support the abrasion material 23. For this purpose each of the supporting-,arms 22 and its corresponding base are made of a single piece of sheet metal, wherein the base portion 21 fits flatwise against the U-shaped frame and the arm portion 22A is bent outwardly therefrom at an angle. This arm portion 22 is stiiily resilient and is arranged and shaped to hold blocks or strips 23 of abrasion material, such as emery, sandstone, or the like. When desired, a scraper 24 may be mounted upon the back of said arm, said scraper consisting of a sheet of metal bent to extend around the end of the arm and bear upon the filter-stone in advance of the abrasion material. ably, however, the strips or blocks of abrasion material are each formed With the advanced or outermost face beveled forwardly at a sharp angle, as shown at 25, so as to constitute a scraper for clearing the stone of mud.

In order to adjust the supports for the abra- Prefer- ISO newly-adjusted position.

It is noted that each of the abrasion-block supports is separately adjustable, in consequence of which each filter-stone is independent of the other stones and its size and abrasion are in no way dependent upon the size of the other filter-stones. A stone which has been reduced in diameter by abrasion may therefore .be used in connection with a new stone, so that the breakage of any one stone does not impair the value of the others. It is also noted that the turning of the adjusting-shaft adjusts all of the abrasionblocks simultaneously, and in ease one stone wears faster than another the pressure is maintained on the harder stone after it has been relieved from the softer stone, so that the diameter of each of the stones is decreased witha tolerable degree of uniformity. So, too, the strips or braces prevent the canting v or tilting of the U-shaped frame from its proper Vertical position, and consequently if the upper end portion or section of the filterstone is harder or softer than the lower portion or section thereof the harder section will be worn down evenly with the softer section.

Obviously the construction hereinbefore described is capable of considerable modification without departing from my invention, and I do not wish to be restricted to the eX- act construction hereinbefore described.

What I claim isl. A lter comprising filter -stones and means for` rotating the same, a threaded shaft arranged transversely of said stones, supports for abrasion material working on said shaft, and abrasion material arranged on said supports to bear against said stones.

2. A filter comprising a tank, filter-stones therein and means for rotating the same, abrasion material for the respective stones, independently-adjustable supports forsuch abrasion material, and a threaded shaft upon which said supports work, said shaft having an end projecting through said tank to provide for the turning thereof, substantially as described.

3. A filter comprising Iilterstones and means for rotating the same, abrasion-blocks arranged to bear against said stones respectively and having their advanced edges beveled to constitute mud-Scrapers, and supports for said abrasion-blocks, and a threaded shaft upon which said support works.

4. A filter comprising a tank, two pairs of filterstones rotatably mounted therein, a

l shaft arranged transversely of said stones and between the stones of each pair and having its end portions threaded in opposite directions, supports for abrasion material threaded to work on said shaft, and abrasion material arranged on said supports to bear against the respective stones, and means for manipulating said transverse shaft.

5. A filter comprising a tank, filter-stones rotatably mounted therein, a threaded shaft arranged between and transversely of said stones, a U-shaped frame threaded to work on said shaft, and stiftiy-resilient an gie-plates fastened iiatwise to said frame and arranged to support abrasion material, and means for manipulating said shaft to force said abrasion material against the respective stones.

6. A filter comprising a tank, filter-stones rotatably mounted therein, a threaded shaft arranged between and transversely of said on said shaft, and stiiiiy-resilient angle-plates adjustably fastened flatwise to said frame and arranged to support abrasion material, and means for manipulating said shaft to force said abrasion material against the respective stones.

'7. A filter comprising a tank, filter-stones rotatably mounted therein, a threaded shaft arranged between and transversely of said stones, a U-shaped frame threaded to work on said shaft, a nut. likewise threaded to work on said shaft and brace-pieces connecting said nut to the ends of said frame, stiftiy-resilient angle-plates fastened fiatwise to said frame and arranged to support abrasion material, and means for manipulating lsaid shaft to force said abrasion material against the respective stones.

8. A filter comprising a tank, filter-stones arranged between and transversely of said stones, a U-shaped frame threaded to work on said shaft, and stiffly-resilientangle-plates fastened flatwise tosaid frame and arranged to support abrasion material, a guide for such frame arranged transversely of said stones near one end of said' frame, and means for manipulating said shaft to force said abrasion material against the respective stones.

9. A filter comprising a tank, filter-stones rotatably mounted therein, a threaded shaft arranged between and transversely of said stones, a U-shaped frame threaded to work on said shaft, and stiftly-resilient angle-plates fastened flatwise to said frame and arranged to support. abrasion material and each angleplate having a scraper arranged to bear against a corresponding stone in advance of the abrasion material, and means for manipulating said shaft to force said abrasion material and Scrapers against the respective stones.

I AUGUST H. KOHLMEYER.

-Witnessesz CARL J. DAUDT, WM. P. CARR.

rotatably mounted therein, a threaded shaftstones, a U-shaped frame threaded to work ICO IOS

IIO 

